This type of symmetry is found in ?

Options

A. Hydra , Pleurobrachia , Tapeworm
B. Tapeworm , Earthworm, Cockroach
C. Hydra , Jelly fish ,Starfish
D. Sponges , Tapeworm , Nereis

Answer

To determine which type of symmetry is found in the organisms listed in the question, we will analyze each option step by step.

### Step 1: Identify the types of symmetry
Symmetry in animals can be classified mainly into two types:
1. **Radial Symmetry**: Organisms can be divided into similar halves by multiple planes passing through the central axis. Common in organisms like jellyfish and starfish.
2. **Bilateral Symmetry**: Organisms can be divided into two similar halves only by one plane, typically seen in organisms like earthworms and cockroaches.

### Step 2: Analyze the options
- **Hydra**: This organism exhibits radial symmetry. It belongs to the phylum Cnidaria.
- **Purobrachia**: This organism is not commonly known, but if it is similar to other Cnidarians, it may also exhibit radial symmetry.
- **Tapeworm**: This organism exhibits bilateral symmetry. It belongs to the phylum Platyhelminthes.
- **Earthworm**: This organism exhibits bilateral symmetry. It belongs to the phylum Annelida.
- **Cockroach**: This organism exhibits bilateral symmetry. It belongs to the phylum Arthropoda.
- **Jellyfish**: This organism exhibits radial symmetry. It belongs to the phylum Cnidaria.
- **Starfish**: This organism exhibits radial symmetry. It belongs to the phylum Echinodermata.
- **Sponges**: These organisms exhibit asymmetry or sometimes radial symmetry. They belong to the phylum Porifera.

### Step 3: Conclusion
From the analysis, we can conclude that:
- **Radial Symmetry** is found in **Hydra**, **Jellyfish**, and **Starfish**.
- **Bilateral Symmetry** is found in **Tapeworm**, **Earthworm**, and **Cockroach**.

Thus, the organisms that exhibit radial symmetry are **Hydra**, **Jellyfish**, and **Starfish**.

### Final Answer
The type of symmetry found in Hydra, Jellyfish, and Starfish is **Radial Symmetry**.

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